LU-1305 osd: procfs support for osd-zfs

procfs support

Signed-off-by: Alex Zhuravlev <bzzz@whamcloud.com>
Change-Id: I599d1317f762b50965f760a590f2f99ffd86bef5
Reviewed-on: http://review.whamcloud.com/2965
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Fan Yong <yong.fan@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>

diff --git a/lustre/osd-zfs/osd_lproc.c b/lustre/osd-zfs/osd_lproc.c
new file mode 100644 (file)
index 0000000..c050acb
--- /dev/null
+++ b/lustre/osd-zfs/osd_lproc.c
@@ -0,0 +1,237 @@
+/*
+ * GPL HEADER START
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; If not, see
+ * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ */
+/*
+ * Copyright (c) 2011, 2012 Whamcloud, Inc.
+ * Use is subject to license terms.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ *
+ * lustre/osd-zfs/osd_lproc.c
+ *
+ * Author: Alex Zhuravlev <bzzz@whamcloud.com>
+ * Author: Mike Pershin <tappro@whamcloud.com>
+ */
+
+#define DEBUG_SUBSYSTEM S_CLASS
+
+#include <obd.h>
+#include <lprocfs_status.h>
+#include <lu_time.h>
+
+#include <lustre/lustre_idl.h>
+
+#include "udmu.h"
+#include "osd_internal.h"
+
+#ifdef LPROCFS
+
+static int osd_stats_init(struct osd_device *osd)
+{
+       int result;
+       ENTRY;
+
+       osd->od_stats = lprocfs_alloc_stats(LPROC_OSD_LAST, 0);
+       if (osd->od_stats != NULL) {
+               result = lprocfs_register_stats(osd->od_proc_entry, "stats",
+                               osd->od_stats);
+               if (result)
+                       GOTO(out, result);
+
+               lprocfs_counter_init(osd->od_stats, LPROC_OSD_GET_PAGE,
+                               LPROCFS_CNTR_AVGMINMAX|LPROCFS_CNTR_STDDEV,
+                               "get_page", "usec");
+               lprocfs_counter_init(osd->od_stats, LPROC_OSD_NO_PAGE,
+                               LPROCFS_CNTR_AVGMINMAX,
+                               "get_page_failures", "num");
+               lprocfs_counter_init(osd->od_stats, LPROC_OSD_CACHE_ACCESS,
+                               LPROCFS_CNTR_AVGMINMAX,
+                               "cache_access", "pages");
+               lprocfs_counter_init(osd->od_stats, LPROC_OSD_CACHE_HIT,
+                               LPROCFS_CNTR_AVGMINMAX,
+                               "cache_hit", "pages");
+               lprocfs_counter_init(osd->od_stats, LPROC_OSD_CACHE_MISS,
+                               LPROCFS_CNTR_AVGMINMAX,
+                               "cache_miss", "pages");
+               lprocfs_counter_init(osd->od_stats, LPROC_OSD_COPY_IO,
+                               LPROCFS_CNTR_AVGMINMAX,
+                               "copy", "pages");
+               lprocfs_counter_init(osd->od_stats, LPROC_OSD_ZEROCOPY_IO,
+                               LPROCFS_CNTR_AVGMINMAX,
+                               "zerocopy", "pages");
+               lprocfs_counter_init(osd->od_stats, LPROC_OSD_TAIL_IO,
+                               LPROCFS_CNTR_AVGMINMAX,
+                               "tail", "pages");
+#ifdef OSD_THANDLE_STATS
+               lprocfs_counter_init(osd->od_stats, LPROC_OSD_THANDLE_STARTING,
+                               LPROCFS_CNTR_AVGMINMAX,
+                               "thandle_starting", "usec");
+               lprocfs_counter_init(osd->od_stats, LPROC_OSD_THANDLE_OPEN,
+                               LPROCFS_CNTR_AVGMINMAX,
+                               "thandle_open", "usec");
+               lprocfs_counter_init(osd->od_stats, LPROC_OSD_THANDLE_CLOSING,
+                               LPROCFS_CNTR_AVGMINMAX,
+                               "thandle_closing", "usec");
+#endif
+       } else {
+               result = -ENOMEM;
+       }
+
+out:
+       RETURN(result);
+}
+
+static int lprocfs_osd_rd_fstype(char *page, char **start, off_t off,
+                               int count, int *eof, void *data)
+{
+       return snprintf(page, count, "zfs\n");
+}
+
+static int lprocfs_osd_rd_mntdev(char *page, char **start, off_t off, int count,
+                               int *eof, void *data)
+{
+       struct osd_device *osd = osd_dt_dev((struct dt_device *)data);
+
+       LASSERT(osd != NULL);
+       *eof = 1;
+
+       return snprintf(page, count, "%s\n", osd->od_mntdev);
+}
+
+static int lprocfs_osd_wr_force_sync(struct file *file, const char *buffer,
+                                       unsigned long count, void *data)
+{
+       struct dt_device  *dt = data;
+       struct lu_env      env;
+       int rc;
+
+       rc = lu_env_init(&env, LCT_LOCAL);
+       if (rc)
+               return rc;
+       rc = dt_sync(&env, dt);
+       lu_env_fini(&env);
+
+       return rc == 0 ? count : rc;
+}
+
+static int lprocfs_osd_rd_iused_est(char *page, char **start, off_t off, int count,
+                                       int *eof, void *data)
+{
+       struct osd_device *osd = osd_dt_dev((struct dt_device *)data);
+       LASSERT(osd != NULL);
+
+       return snprintf(page, count, "%d\n", osd->od_quota_iused_est);
+}
+
+static int lprocfs_osd_wr_iused_est(struct file *file, const char *buffer,
+                                       unsigned long count, void *data)
+{
+       struct osd_device *osd = osd_dt_dev((struct dt_device *)data);
+       int                rc, val;
+
+       LASSERT(osd != NULL);
+
+       rc = lprocfs_write_helper(buffer, count, &val);
+       if (rc)
+               return rc;
+
+       osd->od_quota_iused_est = !!val;
+
+       return count;
+}
+
+struct lprocfs_vars lprocfs_osd_obd_vars[] = {
+       { "blocksize",       lprocfs_osd_rd_blksize,     0, 0 },
+       { "kbytestotal",     lprocfs_osd_rd_kbytestotal, 0, 0 },
+       { "kbytesfree",      lprocfs_osd_rd_kbytesfree,  0, 0 },
+       { "kbytesavail",     lprocfs_osd_rd_kbytesavail, 0, 0 },
+       { "filestotal",      lprocfs_osd_rd_filestotal,  0, 0 },
+       { "filesfree",       lprocfs_osd_rd_filesfree,   0, 0 },
+       { "fstype",          lprocfs_osd_rd_fstype,      0, 0 },
+       { "mntdev",          lprocfs_osd_rd_mntdev,      0, 0 },
+       { "force_sync",      0, lprocfs_osd_wr_force_sync     },
+       { "quota_iused_estimate",  lprocfs_osd_rd_iused_est,
+               lprocfs_osd_wr_iused_est,   0, 0 },
+       { 0 }
+};
+
+struct lprocfs_vars lprocfs_osd_module_vars[] = {
+       { "num_refs",        lprocfs_rd_numrefs,         0, 0 },
+       { 0 }
+};
+
+int osd_procfs_init(struct osd_device *osd, const char *name)
+{
+       struct lu_device    *ld = &osd->od_dt_dev.dd_lu_dev;
+       struct obd_type     *type = ld->ld_type->ldt_obd_type;
+       int                  rc;
+       ENTRY;
+
+       if (osd->od_proc_entry)
+               RETURN(0);
+
+       LASSERT(name != NULL);
+       LASSERT(type != NULL);
+
+       osd->od_proc_entry = lprocfs_register(name, type->typ_procroot,
+                       lprocfs_osd_obd_vars, &osd->od_dt_dev);
+       if (IS_ERR(osd->od_proc_entry)) {
+               rc = PTR_ERR(osd->od_proc_entry);
+               CERROR("Error %d setting up lprocfs for %s\n", rc, name);
+               osd->od_proc_entry = NULL;
+               GOTO(out, rc);
+       }
+
+       rc = osd_stats_init(osd);
+
+       GOTO(out, rc);
+out:
+       if (rc)
+               osd_procfs_fini(osd);
+       return rc;
+}
+
+int osd_procfs_fini(struct osd_device *osd)
+{
+       ENTRY;
+
+       if (osd->od_stats)
+               lprocfs_free_stats(&osd->od_stats);
+
+       if (osd->od_proc_entry) {
+               lprocfs_remove(&osd->od_proc_entry);
+               osd->od_proc_entry = NULL;
+       }
+
+       RETURN(0);
+}
+
+#endif